<template>
  <div>
    <el-card class="box-card">
      <div slot="header" class="clearfix">
        <span>文章列表</span>
      </div>
      <!-- 搜索区域 -->
      <div class="search-box">
        <el-form :inline="true" :model="q">
          <el-form-item label="文章分类">
            <el-select v-model="q.cate_id" placeholder="请选择分类" size="small">
              <el-option :label="item.cate_name" :value="item.id" v-for="item in cateList" :key="item.id"></el-option>
            </el-select>
          </el-form-item>
          <el-form-item label="发布状态" style="margin-left: 15px;">
            <el-select v-model="q.state" placeholder="请选择状态" size="small">
              <el-option label="已发布" value="已发布"></el-option>
              <el-option label="草稿" value="草稿"></el-option>
            </el-select>
          </el-form-item>
          <el-form-item>
            <el-button type="primary" size="small" @click="loadArtlist">筛选</el-button>
            <el-button type="info" size="small"  @click="resetForm">重置</el-button>
          </el-form-item>
        </el-form>
        <!-- 发表文章的按钮 -->
        <el-button type="primary" size="small" class="btn-pub" @click="pubVisible=true">发表文章</el-button>
      </div>

      <!-- 文章表格区域 -->
       <el-table
       border
    :data="artList"
    stripe
    style="width: 100%">
    <el-table-column
      label="文章标题">
      <template v-slot="{row}">
          <el-link type='primary' @click="showDetail(row.id)">{{row.title}}</el-link>
      </template>
    </el-table-column>
    <el-table-column
      prop="cate_name"
      label="文章分类">
    </el-table-column>
    <el-table-column
      label="发布时间">
      <template v-slot="{row}">
         {{formdate(row.pub_date)}}
      </template>
    </el-table-column>
    <el-table-column
      prop="state"
      label="状态">
    </el-table-column>
    <el-table-column
      label="操作">
      <template v-slot="{row}">
        <el-button type="danger" size="mini" @click="removeDetail(row.id)">删除</el-button>
      </template>
    </el-table-column>
  </el-table>
      <!-- 分页区域 -->
       <el-pagination
      @size-change="handleSizeChange"
      @current-change="handleCurrentChange"
      :current-page="q.pagenum"
      :page-sizes="[2,3,5,20]"
      :page-size="q.pagesize"
      layout="total, sizes, prev, pager, next, jumper"
      :total="total">
    </el-pagination>
    </el-card>
    <el-dialog
  title="发布文章"
  fullscreen
  :visible.sync="pubVisible"
  :before-close="handleClose">
 <!-- 发布文章的对话框 -->
         <el-form :model="pubForm" :rules="pubformRules" ref="formRef" label-width="100px">
             <el-form-item label="文章标题" prop="title">
           <el-input v-model="pubForm.title" ></el-input>
                  </el-form-item>
         <el-form-item label="文章分类" prop="cate_id">
          <el-select v-model="pubForm.cate_id" placeholder="请选择分类" style="width: 100%;">
            <el-option v-for="item in cateList" :key="item.id" :label="item.cate_name" :value="item.id"></el-option>
          </el-select>
         </el-form-item>
         <el-form-item label="文章内容" prop="content">
  <!-- 使用 v-model 进行双向的数据绑定 -->
  <quill-editor v-model="pubForm.content" @blur="$refs.formRef.validateField('content')"></quill-editor>
         </el-form-item>
         <el-form-item label="文章封面" prop="cover_img">
  <!-- 用来显示封面的图片 -->
          <img v-if="preview" :src="preview" alt="" class="cover-img" ref="imgRef" />
          <img v-else src="../../../assets/images/cover.jpg" alt="" class="cover-img" ref="imgRef" />
  <br />
  <!-- 文件选择框，默认被隐藏 -->
  <input type="file" style="display: none;" accept="image/*" ref="iptFile" @change="hImgChange"/>
  <!-- 选择封面的按钮 -->
  <el-button type="text" @click="chooseImg">+ 选择封面</el-button>
</el-form-item>
 <el-form-item size="large">
    <el-button type="primary" @click="hub('已发布')">发表</el-button>
    <el-button type="info" @click="hub('草稿')">草稿箱</el-button>
  </el-form-item>
         </el-form>
</el-dialog>
<!-- 文件预览版块 -->
<el-dialog
  title="文件预览"
  :visible.sync="dateilDialogVisible"
  width="70%">
<h1 class="title">{{ artDetail.title }}</h1>

  <div class="info">
    <span>作者：{{ artDetail.nickname || artDetail.username }}</span>
    <span>发布时间：{{formdate() }}</span>
    <span>所属分类：{{ artDetail.cate_name }}</span>
    <span>状态：{{ artDetail.state }}</span>
  </div>

  <!-- 分割线 -->
  <el-divider></el-divider>

  <!-- 文章的封面 -->
  <img :src="'http://www.liulongbin.top:3008' + artDetail.cover_img" alt="" />

  <!-- 文章的详情 -->
  <div v-html="artDetail.content" class="detail-box"></div>
</el-dialog>
  </div>
</template>

<script>
import dayjs from 'dayjs'
export default {
  name: 'ArtList',
  data() {
    return {
      dateilDialogVisible: false,
      total: 0,
      // 查询参数对象
      q: {
        pagenum: 1,
        pagesize: 2,
        cate_id: '',
        state: ''
      },
      pubVisible: false,
      // 表单的数据对象
      pubForm: {
        title: '',
        cate_id: '',
        content: '',
        cover_img: '',
        state: ''
      },
      // 表单的验证规则对象
      pubformRules: {
        title: [
          { required: true, message: '请输入文章标题', trigger: 'blur' },
          { min: 1, max: 30, message: '文章标题的长度为1-30个字符', trigger: 'blur' }
        ],
        cate_id: [{ required: true, message: '请选择文章标题', trigger: 'blur' }],
        content: [{ required: true, message: '请写入文章内容', trigger: 'blur' }],
        cover_img: [{ required: true, message: '请上传图片', trigger: 'blur' }]
      },
      cateList: [],
      preview: '',
      artList: [],
      artDetail: {}
    }
  },
  methods: {
    removeDetail(id) {
      this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).then(async() => {
        const { data: res } = await this.$http.delete('/my/article/info', {
          params: {
            id
          }
        })
        if (res.code !== 0) return this.$message.error(res.message)
        this.$message.success(res.message)
        if (this.artList.length === 1 && this.q.pagenum > 1) {
          this.q.pagenum--
        }
        this.loadArtlist()
      }).catch(() => {
      })
    },
    async showDetail(id) {
      const { data: res } = await this.$http.get('/my/article/info', { params: { id } })
      if (res.code !== 0) return
      this.artDetail = res.data
      this.dateilDialogVisible = true
    },
    resetForm() {
      this.q = {
        pagenum: 1,
        pagesize: 2,
        cate_id: '',
        state: ''
      }
      this.loadArtlist()
    },
    handleSizeChange(val) {
      this.q.pagesize = val
      this.q.pagenum = 1
      this.loadArtlist()
      console.log(`每页 ${val} 条`)
    },
    handleCurrentChange(val) {
      this.q.pagenum = val
      this.loadArtlist()
      console.log(`当前页: ${val}`)
    },
    handleClose(done) {
      this.$confirm('确定退出吗？数据会消失的哦！', '提示', {
        type: 'warning'
      })
        .then(_ => {
          done()
        })
        .catch(_ => {})
    },
    async initCateList() {
      const { data: res } = await this.$http.get('/my/cate/list')
      if (res.code === 0) {
        this.cateList = res.data
      }
    },
    chooseImg() {
      this.$refs.iptFile.click()
    },
    hImgChange(e) {
      const file = e.target.files[0]
      // console.log(file)
      if (file) {
        // 设置表单数据
        this.pubForm.cover_img = file
        // 设置预览图片
        // 核心: 将图片文件转成 img 的 src 可支持的格式 (BASE64 / URL)
        // const str = URL.createObjectURL(file)
        // console.log(str)
        this.preview = URL.createObjectURL(file)
        // 小作业: 使用 FileReader 转为 BASE64 后做预览
        // 手动校验
        // this.$refs.pubForm.validateField('cover_img')
      } else {
        this.pubForm.cover_img = ''
        this.preview = ''
        this.$refs.imgRef.value = ''
      }
      this.$refs.formRef.validateField('cover_img')
    },
    hub(state) {
      this.pubForm.state = state
      this.$refs.formRef.validate(async valid => {
        if (!valid) return
        const fd = new FormData()
        Object.keys(this.pubForm).forEach(k => fd.append(k, this.pubForm[k]))
        const { data: res } = await this.$http.post('/my/article/add', fd)
        if (res.code !== 0) return this.$message.error(res.message)
        this.$message.success(res.message)

        this.pubVisible = false
        this.$refs.formRef.resetFields()
        this.preview = ''
        this.resetForm()
      })
    },
    async loadArtlist() {
      const { data: res } = await this.$http.get('/my/article/list', { params: this.q })
      this.artList = res.data
      this.total = res.total
    },
    formdate(date) {
      return dayjs(date).format('YYYY-MM-DD HH:mm:ss')
    }
  },
  created() {
    this.initCateList()
    this.loadArtlist()
  }
}
</script>

<style lang="less" scoped>
.search-box {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  .btn-pub {
    margin-top: 5px;
  }
}
/deep/ .ql-editor{
    min-height: 300px;
}
.cover-img {
  width: 400px;
  height: 280px;
  object-fit: cover;
}
.title {
  font-size: 24px;
  text-align: center;
  font-weight: normal;
  color: #000;
  margin: 0 0 10px 0;
}

.info {
  font-size: 12px;
  span {
    margin-right: 20px;
  }
}

// 修改 dialog 内部元素的样式，需要添加样式穿透
/deep/ .detail-box {
  img {
    width: 500px;
  }
}
</style>
